Effect of yttrium substitution on the superconducting properties of La1−xYxO0.5F0.5BiS2
I. Jeon, D. Yazici, B. D. White, A. J. Friedman, M. B. Maple
DOI 10.1103/PhysRevB.90.054510 · Physical Review B
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Abstract
We present the effect of yttrium substitution on superconductivity in the La1−xYxO0.5F0.5BiS2 system. Polycrystalline samples with nominal Y concentrations up to 40% were synthesized and characterized via electrical resistivity, magnetic susceptibility, and specific-heat measurements. Y substitution reduces the lattice parameter a and unit-cell volume V, and a correlation between the lattice parameter c, the La-O-La bond angle, and the superconducting critical temperature Tc is observed. The chemical pressure induced by Y substitution for La produces neither the high-Tc superconducting phase nor the structural phase transition seen in LaO0.5F0.5BiS2 under externally applied pressure.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1-xYxO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi4O4S3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.6 | Pressure not reported | onset |
| LaO0.5F0.5BiS2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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